Road Test the Vehicle

Road Test the Vehicle

1. During the road test, use the following driving methods to diagnose the problem.

- Start the engine.

- Evaluate the noise in NEUTRAL while the vehicle is parked.

- Check whether the noise is present with the clutch fully disengaged (pedal fully depressed). Check to see if the pedal pulsates abnormally (for clutch diaphragm finger run out).

- Check whether the noise is present with the gearshift in the NEUTRAL position and the clutch fully engaged (foot off pedal). With the parking brake engaged, move the gearshift towards the 1st gear position. Apply very slight pressure and note if the gear noise level is reduced. (for gear rollover noise).

- With the clutch fully engaged (foot off pedal) check whether the noise is present as the engine speed is raised. If the noise reduces, note the engine speed at which this occurs.

- For dual mass flywheel: sprung center.

- For single mass flywheel: function.

- Listen for any change in noise while depressing and releasing the clutch pedal.

- Listen for any change in noise while changing the engine rpm.

- Drive the vehicle and shifi through all of the gear ranges, including reverse. Listen for any change in noise in a particular gear.

- Drive the vehicle in the gear in which the noise is most noticeable. Depress the clutch pedal and leave the gear engaged. Listen for any change in noise.

- Drive the vehicle in the gear in which is most noticeable. Depress the clutch pedal and shifi the transmission into NEUTRAL. Release the clutch pedal and allow the vehicle to coast.

2. Compare the road test results with the following symptom chart. It is a list of conditions that are typical faults into which the transaxle will fall:

- GO to Symptom Chart. Symptom Related Diagnostic Procedures